REST API & Third-Party Integration UK — Connect, Automate & Scale Your Business
We design and build robust REST APIs and integrate your platforms with 100+ third-party services — Stripe, HubSpot, Twilio, AWS, Salesforce & beyond — so your systems work seamlessly together.
Our Services
Everything We Build with REST APIs & Integrations
From API architecture to complex multi-platform integration pipelines — we handle every aspect of your API and integration needs.
Custom REST API Development
We design and build scalable, well-documented REST APIs from scratch using industry best practices — versioning, pagination, error handling, and full OpenAPI/Swagger documentation included.
GraphQL API Development
Need flexible, efficient data fetching? We build GraphQL APIs with schema design, resolvers, subscriptions, and full integration into your front-end or mobile applications.
Payment Gateway Integration
We integrate Stripe, PayPal, GoCardless, WorldPay, and more — including subscriptions, refunds, SCA-compliant 3DS2 flows, and real-time webhook handling.
Email & SMS Integration
We connect your platform with SendGrid, Mailchimp, Mailgun, Twilio, AWS SES, and more — enabling transactional emails, marketing automation, and SMS notifications.
CRM & Marketing Automation
We integrate HubSpot, Salesforce, Pipedrive, and Zoho CRM — syncing contacts, deals, and events between your application and your sales team's tools in real time.
ERP & Accounting Integration
We connect Xero, QuickBooks, Sage, and SAP to your platform — automating invoicing, inventory sync, financial reporting, and purchase orders without manual effort.
Cloud Service Integration
We integrate AWS (S3, Lambda, SQS, SNS), Google Cloud, and Azure services — including file storage, serverless functions, queues, and AI/ML APIs.
OAuth & SSO Integration
We implement secure OAuth 2.0 / OpenID Connect flows and Single Sign-On (SSO) with Google, Microsoft, Auth0, Okta, and custom identity providers.
Webhook Development & Management
We build reliable webhook systems for real-time event-driven communication between services — including retry logic, signature verification, and event replay.
Why REST APIs
Why REST API Integration is Critical for Your Business
Modern businesses run on dozens of platforms. Without proper API integration, data lives in silos — costing you time, money, and growth opportunities.
Automate Manual Processes
Stop manually exporting CSV files and copying data between tools. API integration automates your workflows and frees your team to focus on what matters.
Single Source of Truth
With connected systems, your data is always consistent and up-to-date across every platform — CRM, ERP, e-commerce, and beyond.
Accelerate Business Growth
Integrated platforms scale effortlessly. Whether you're onboarding 10 or 10,000 customers, your systems handle it without additional headcount.
Reduce Operational Costs
Eliminating manual data entry and human error dramatically reduces your operational overhead — delivering measurable ROI within weeks of deployment.
Best-of-Breed Tool Stack
You shouldn't have to compromise on software because it doesn't integrate. We connect any combination of tools, letting you use the best platform for each job.
Real-Time Business Intelligence
With connected data flows, you gain real-time visibility across every department — enabling faster, smarter decisions based on accurate information.
Platforms We Integrate
We've integrated virtually every major platform. If it has an API, we can connect it to your system.
Stripe
Shopify
SendGrid
Twilio
HubSpot
AWS
Xero
Salesforce
Slack
Auth0
Google Maps
WooCommerce
How We Work
Our API Integration Development Process
A structured, transparent process that minimises risk and maximises delivery speed — from first conversation to live in production.
Discovery & Mapping
We audit your existing systems, map your data flows, and define the full integration scope and API architecture.
API Design
We design your API contracts, data models, and integration blueprints — with full OpenAPI documentation before a single line is written.
Development
We build in iterative sprints, keeping you in the loop with weekly demos, test environments, and continuous delivery.
Testing & Security
Every integration is rigorously tested — unit, integration, load, and penetration tests — before any production deployment.
Deployment & Support
We deploy with zero-downtime strategies and monitor your integrations post-launch, ensuring everything runs flawlessly.
Transparent Pricing
REST API & Integration Pricing UK
Honest, fixed-price packages for UK businesses. No surprises, no lock-in, no hidden fees.
- Single Third-Party API Integration
- Webhook Setup & Configuration
- Basic Authentication (OAuth / API Key)
- Error Handling & Retry Logic
- Integration Testing & QA
- 30 Days Post-Launch Support
- Custom REST API Development
- Up to 3 Third-Party Integrations
- OpenAPI / Swagger Documentation
- Payment & CRM Integration
- Real-Time Webhook Management
- 60 Days Dedicated Support
- API Gateway Architecture
- Unlimited Platform Integrations
- Event-Driven Architecture (Kafka/SQS)
- Advanced Security & Rate Limiting
- Dedicated Integration Engineer
- 90 Days SLA-Backed Support
Why Choose Us
Why UK Businesses Choose Us for API Integration
We're not generalists. We're API integration specialists with deep technical expertise and a portfolio of complex, mission-critical integrations.
Deep API Expertise
Our team has built and integrated APIs across payments, CRM, cloud, communications, and logistics — with senior-level engineers on every project.
Full API Documentation
Every API we build ships with comprehensive OpenAPI/Swagger documentation and Postman collections so your team can use and extend it with confidence.
Security-First APIs
We implement OAuth 2.0, JWT, API key management, rate limiting, IP whitelisting, and HTTPS enforced on every API we deliver.
Monitoring & Observability
We set up API monitoring, alerting, and logging from day one — so you have full visibility into your integrations' health and performance.
Vendor-Agnostic Approach
We recommend the best tool for your use case, not the one that pays us the most. Your business needs always come first.
Long-Term Partnership
APIs evolve. We offer ongoing retainer support to update integrations as third-party APIs change and your business requirements grow.
Technology Stack
API Technologies & Tools We Use
We work with the modern, battle-tested API ecosystem to build your integrations right the first time.
FAQ
Frequently Asked Questions
REST API integration costs in the UK start from £800 for a single third-party integration. Multi-platform integrations typically range from £1,200 to £1600+. Enterprise-grade API gateway architectures and complex integration pipelines are priced on a bespoke basis. We provide detailed, fixed-price quotes after a free discovery call.
A simple single-platform integration (e.g. Stripe payment integration) typically takes 1–2 weeks. Multi-platform integrations with custom business logic usually take 4–8 weeks. Enterprise integration pipelines can take 10–16 weeks. We provide accurate timelines during the discovery phase.
Both are excellent choices with different strengths. Laravel is ideal for structured, enterprise-grade APIs with strong conventions and built-in features. Node.js excels for high-throughput, real-time APIs and microservices. We'll recommend the right technology based on your project's specific requirements, existing tech stack, and team expertise.
Absolutely. We specialise in integrating existing systems — regardless of how they were built — with third-party platforms. Whether your system is built in PHP, Python, .NET, or anything else, we can design integration middleware and connectors that work seamlessly with your existing codebase.
Yes — comprehensive API testing is part of every project. We deliver unit tests, integration tests, and full Postman/Insomnia test collections. For Laravel APIs, we use PHPUnit and Laravel Dusk. For Node.js APIs, we use Jest and Supertest. All APIs are also load-tested before production deployment.
Every project includes 30–90 days of dedicated post-launch support, covering bug fixes, performance tuning, and third-party API version updates. We also offer ongoing retainer packages for businesses that need continuous integration management, monitoring, and feature development as requirements evolve.
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